从第一个五年计划到第十四个五年规划，一以贯之的主题是把我国建设成为社会主义现代化国家。五年规划的编制不仅展现了"中国之治"的巨大魅力，更潜藏着中国实现现代化和经济社会持续健康发展的成功密码。这表明五年规划是（ ）
①关于我国不同阶段经济社会的能动反映 ②有目的有步骤地实现现代化的客观过程
③我国对经济社会发展目标自觉选择的结果 ④指导我国社会主义现代化建设的行动指南
| A． |
①② |
B． |
①③ |
C． |
②④ |
D． |
③④ |
Today we have chat rooms, text messages and email, but we seem _______ the art of communicating face-to-face.
| A．losing | B．to be losing |
| C．to be lost | D．having lost |
_________ to too much sunlight will do harm to your skin.
| A．Having exposed | B．Being exposed |
| C．To be exposed | D．Exposed |
（）There is no greater pleasure than lying on my back in the middle of the grassland, _____at the night sky.
| A．to stare | B．staring |
| C．stared | D．having stared |
__________ the program , they have to stay there for another two weeks.
| A．Not completing | B．Not having completed |
| C．Not completed | D．Having not completed |
What worried the child most was _______ to visit his mother in the hospital.
| A．his not allowing |
| B．his not being allowed |
| C．his being not allowed |
| D．having not been allowed |